声脉冲发送器置于水下产生声脉冲的装置，如回音器中的装置 A device used underwater to produce pulses of sound, as for an echo sounder.
我申请了几家公司，其中一家答应给我一份工作，但我想等另外几家公司有了回音再作决定。 One of the firms I applied to has offered me a job but I am keeping my options open until I hear from the others.
